| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
In-situ Interferometric Monitoring of Dual-wavelength Vat Photopolymerization |
| Author(s) |
Yue Zhang, Haolin Zhang, Xiayun Zhao |
| On-Site Speaker (Planned) |
Yue Zhang |
| Abstract Scope |
Dual-wavelength digital light processing based vat photopolymerization process (VPP), referred to as VPP2λ, is an emerging multi-material 3D printing technology, which uses two concurrent optical masks to selectively cure different components in a single vat. The VPP2λ process will facilitate the design and fabrication of various applications including flexible electronics and small robotics. In this work, we develop a non-destructive in-situ interferometric monitoring (ICM) method to monitor the unique wavelength-selective multi-material photopolymerization process dynamics during the VPP2λ. The ICM-acquired interferogram data is processed by using machine learning to accurately identify good pixels that could reflect the characteristic curing stages. The good pixels are further analyzed using a multi-beam interference based sensor model to estimate each voxel’s average refractive index. A correlation model is developed to use the refractive index values to predict the profile of degree of curing (DoC) for revealing the spatially varying kinetics in VPP2λ. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |